OB233FSP
- 格式：pdf
- 大小：708.48 KB
- 文档页数：10
(UVLO). Excellent EMI performance is achieved ■ Low VDD startup current and low operating
with On-Bright proprietary frequency shuffling
current
technique together with soft switching control at ■ Leading edge blanking on current sense input
compensated o Cycle-by-Cycle over-current threshold
setting for constant output power limiting over universal input voltage range. o Accurate overload protection (OLP). o Over voltage protection(OVP) o Secondary rectifier short protection
Min Typ Max Unit
Supply Voltage (VDD)
VDD=UVLO(OFF)-1V,
Istartup
VDD start up current
measure leakage current
5 20 uA
into VDD
IVDD_Operation UVLO(ON)
Operation current
junction
-40 to 150℃
Min/Max storage temperature
子 Tstg 电 Lead temperature (soldering,
10secs)
-55 to 150℃ 260℃
星 Note: Stresses beyond those listed under “absolute
OB233F
High Performance Current Mode PWM Power Switch
ELECTRICAL CHARACTERISTICS
(TA = 25℃, VDD=16V, unless otherwise noted)
Symbol
Parameter
Test Conditions
standby power, and cost effective off-line flyback
Vds stress
converter applications.
■ Frequency shuffling for EMI
OB233F offers complete protection coverage with ■ Extended burst mode control for improved
RCeuferrreenntce OTP
Soft Driver
Power MOSFET
VDD 3 Internal supply
RQ
Soft Start
S
OCP
LDO
OSC
Extended
Burst mode
UVLO POR
子Slope
compensation
SENSE 4
CPL
星电 Vth
LEB Internal supply
©On-Bright Electronics
Confidential -3-
Preliminary Datasheet OB_DOC_DS_233F01
OB233F
High Performance Current Mode PWM Power Switch
BLOCK DIAGRAM
VDD2_G Drain 5/6
OB233F
High Performance Current Mode PWM Power Switch
GENERAL DESCRIPTION
FEATURES
OB233F combines a dedicated current mode ■ Standby power lower than 100mW at
OB233F X X
On-Bright confid Current Mode PWM Power Switch
e S:DIP7
Package Pb-free P : Pb-free
©On-Bright Electronics
Confidential -2-
Preliminary Datasheet OB_DOC_DS_233F01
子 o VDD under voltage lockout with hysteresis (UVLO) o Over temperature protection (OTP) with
电 auto- recovery 星 o On-Bright proprietary line input
群 APPLICATIONS 众 Offline AC/DC flyback converter for to ■ AC/DC adapter l ■ PDA power supplies tia ■ Digital cameras and camcorder adapter
VFB=3V
VDD under voltage lockout
enter
1.6
mA
7.0 8.0 9.0 V
UVLO(OFF)
VDD under voltage Lockout Exit (Recovery)
15.2 16.2 17.2 V
OVP(ON)
Over voltage voltage
protection CS=0V,FB=3V ramp up VDD until gate clock is off
群 maximum ratings” may cause permanent damage to the device.
众 Ordering Information to Part Number Description ential OB233FSP DIP7, Pb-free
These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability.
27.5 29
30.5 V
Feedback input section(FB pin)
VFB_OPEN IFB_SHORT
VFB Open Loop Voltage FB pin short circuit current
Package Dissipation Rating
Package
RJA (℃/W)
DIP7
75
Note: Drain Pin Connected to 100mm2 PCB copper clad.
Absolute Maximum Ratings
Parameter
Value
Drain voltage (off state)
the totem pole gate drive output.
■ Comprehensive protection coverage
The tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation. OB233F is offered in DIP7 package.
-0.3V to BVdss
VDD voltage
-0.3V to 30 V
VDD-G input voltage
-0.3V to 30 V
FB input voltage
-0.3 to 7V
Sense input voltage
-0.3 to 7V
Min/Max operating temperature TJ
■ VCR, SVR, STB, DVD&DVCD Player SMPS
n ■ Set-top box power fide ■ Auxiliary power supply for PC and Server
■ Open-frame SMPS
On-Bright con TYPICAL APPLICATION
PWM controller with a high voltage power
universal AC input
MOSFET. It is optimized for high performance, low ■ Power on soft start reducing Power MOSFET
电
I
星 Feedback input pin. The PWM duty cycle is determined by voltage level into this pin
and the current-sense signal at Pin 4.
群
P I P
O
Internal gate driver power supply
Output Power Table
Product
